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Full Jacket FB set, type -S
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Quantity in Basket:
None
Catalog No.: FJFB-3-S
Price: $775.00
Shipping Weight: 3.00 pounds
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FJFB-3-S consists of a core swage (CSW-1-S), core
seater (CS-1-S), and point form die (PF-1-S), to make most
flat, dish, or cup base jacketed rifle and handgun bullets.
The first die is core swage, to adjust the weight of the
cut piece of lead wire (or cast lead core), and to expand
it upward in diameter to fit the jacket ID. This die provides
extremely precise weight control.
The second die is the core seater, which is used to assemble
the jacket and the core into a tightly fitted unit, by expanding
the lead core inside the jacket, and using the high pressure
generated to exapnd the jacket to proper diameter. Hollow
point cavities and other shapes are pressed into the core
during this stage, with various shapes of external punches.
The third die is the point former, which shapes the ogive
smoothly on the seated core and jacket assembly. This is
usually the final step, for open tip designs. Full jacket
and lead tip designs can use additional steps, either in the
same die, or with lead tips, in the optional LT-1-S lead
tip forming die. Adding a LT-1-S die makes the set a
LTFB-4-S four die set.
Please note that "Full Metal Jacket" or "FMJ" is a military term meaning open base and solid tip, and that is NOT what we mean by "FJ" or "fully jacketed" here. What we mean is that the jacket can cover the core entirely, but the base is solid and the tip is either open (default) or a lead tip (option). A military solid FMJ bullet requires pushing the jacket backward into the point form die, to create the nose on the jacket base, and then steps to angle and then fold over the open end of the jacket against the core at the base, using a special FMJ base-turning punch (optional). This is style is less effective than the open tip, and is no cheaper or quicker to make.
You need to specify the diameter of bullet, and the ogive
shape of the nose. In addition, the die-makers need to have
sample jackets, or to know which Corbin jacket to use in
making the core swage die and the external core seating
punch (which, for open tip bullets, fits inside the jacket).
Large lead tips use a core seating external punch which
fits the ID of the core seat die, rather than the ID of
the jacket.
SEE TIP DESIGN INFORMATION
- Open tip = core is shorter than the jacket, so bullet has little or no exposed lead when ogive is formed.
- Lead tip = core is longer than the jacket, so bullet has exposed lead tip when ogive is formed.
- Open tip Hollow Point = core is shorter than jacket, and the external seating punch has a conical projection poking a hole in the core.
- Lead tip hollow Point = core is longer than jacket, and the externl seating punch has a conical projection poking a hole in the core.
Note that when people say "hollow point" they sometimes confuse this with "open tip". The "open tip" is the default style, the one you get if you don't specify oather kinds of punches. The "open tip" seating punch MUST be a very snug fit into the bullet jacket, often too large to fit by hand pressure alone. The diameter depends on the jacket wall thickness at the point where the core wil be seated. That is, a tapered jacket wall gets thicker toward the jacket base, so a short or light core will require a smaller diameter open tip punch compared to a longer, heavier core. Jacket samples or specific dimensions would be rquired for jackets other than those provided by Corbin (we know our own jacket wall thickness).
IF you order without any special note to tell us otherewise, we will assume that your standard, open tip punch fits our jacket and your core weight will be such that the core is seated relatively close to the open jacket end. If you then try to make a much lighter bullet, with a shorter core, the open tip seating punch provided will be too large for seating at that depth in some jackets (those with much of a taper to the wall). You can order additional core seating external punches to fit if you send us a sample jacket and the weight of core you plan to use (or if you are using our jackets, just tell us the weight or the length of the core you plan to use),
Please note that a LT punch, or a LT-HP punch, does not fit into the jacket ID. It is sized to fit into the die bore. Therefore, the jacket you use with a LT punch or LT-HP punch does not matter to the punch diameter. Only the OT or the OT-HP punches fit into the jacket ID, and must be properly sized for the jacket wall thickness.
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